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<br />'. -'1'. .',"',._ <br />. . t~ ~... ',' .., . , <br />~~;':'". ,.,:~ H~':;i~~';::~.(<,~, <br />"-~-'-"''''''''~'I'.,.?.."..ijI <br />: "':\'I:;~W~\~\::J~~1~ .,-~ 'a :,:-.~.:; ~*..i..t: <br />--U'-.-.n" 'k\'~F: '-.1. _." ""/'" <br />"'UW';j'1-~;"J-\.\'" . /")-"""..,.,;.'_:.~, <br />,.0,' . . ,.... , . "II:~,.. ;"'1."5,'~~.[' <br />'_ " Il'r.'., ".'..... <br />'-~--<;""n''''''''-''~~ <br />~ .. - t .,i 1 ~. <br />- '.,1, <br />,'I.. <br />,- l :.1 ~ <br />- ,', ~ ~ .... . <br />-,. ~..'/ r:ot~,J <br />4.~!' fc]I. <br />"'~.;2. {;../. <br />I,;, t'.~. <br /> <br />l'iJ"f~ <br /> <br />Annual Report <br /> <br />Operation of the <br />Colorado River Basin 1977 <br />Projected Operations 1978 <br /> <br />U.s. Department of the Interior <br />Cecil D. Andrus, Secretary <br /> <br />Bureau of Redamatlon <br />R. Keith Higginson, Commissioner <br /> <br />January 1978 <br /> <br />Contents <br /> <br />I ntrod uction. . . . . . . . . . . . . . . .. . <br />Autl10rity for Report. . . . . . . . . <br />Actual Operations under Criteria-Water Year 1977.. . . <br />Upper Basin Reservoirs. . . . . . . . . . . <br />Lower Basin Reservoirs. ...... ..... <br />River Regulations. <br />Beneficial Consumptive Uses. . <br />Upper Basin Uses..... . <br />Lower Basin Uses and Losses. ........ <br />Water Quality Control. . . . . . . . . . . . . . . . . . <br />Water Quality Operations during Water Year 1977... <br />Enl1ancement of Fisl1 and Wildlife... . . . . . . . <br />Upper Basin. <br />Lower Basin. . . . . . . . . <br />Preservation of Environment. <br />Projected Plan of Operation under Criteria for Current <br /> <br />Year.. ............ <br />Determination of "602(a) Storage".... <br />Lower Basin Requirements. <br />Plan of Operation-Water Year 1978. . . . <br />Upper Basin Reservoirs. . . <br />Lower Basin Reservoirs.. <br /> <br />(Prepared pursuant to the Colorado River Basin <br />Project Act of 1968, Public Law 90-537) <br /> <br />,:",' <br /> <br />~. <br /> <br />-c.,~__ ..~ ~ <br />- - <br /> <br />,. -.-. <br /> <br />ii <br />ii <br />1 <br />2 <br />16 <br />22 <br />23 <br />23 <br />24 <br />25 <br />25 <br />26 <br />26 <br />26 <br />27 <br /> <br />29 <br />29 <br />31 <br />32 <br />33 <br />34 <br />